Turret lathe stop



` H. E. RATHER, sR

July 4, 1950 TURRET LATI-1E STOP 2 Sheets-Sheet l Filed May 10, 1945 July-4, 1950 H. rs;` RATHER, SR

TURRET LATHE STOP 2 Sheets-Sheet 2 IIIII.L

Filed May 10, 1945 i k N fun/Wawy Patented July 4, 1950 'UNITED STATES P T FF l CIE TURRET LATHE STOP vHobart E. Rather, Sr., Bristol, .-Tenn., `assignorof one-,fourth to James R. .Ee1ty, Bristol, Tenn.

Application'MaylO, 194`5,`-'Serial No. 592,976

2 Claims. l

This invention relates to a turret lathe zstop,

-and more particularly tosucha lathe istop embodying a micrometer in association withatur- :ret stop forprovding a pluralitybf readily/possitionable .micrometrically .accurate istops Ato :be Vutilized in conjunction with a lathewhenfafplucrometrically adjustable and having vmeans whereby the exact positioning of the requisite stop vmember may be accomplished substantially automatically.

An additional-object vof :the invention `is Zthe provision of such adevice-which willvbesturdy and durable in construction, reliable and eflicient in operation, and relatively simple and inexpensive to manufacture, assemble and install.

Other objects reside in the combinations of elements, arrangements of parts, and features of construction, all as will be more fully pointed out hereinafter and disclosed in the `accompanying drawings, wherein is shown a preferred embodiment of this inventive concept.

In the drawings, wherein like reference characters are used to denote like parts:

Figure l is a side view partially in elevation and partially in section of one form of device embodying features of this invention.

Figure 2 is a front elevational view of the device shown in Figure 1, certain parts thereof being omitted, and certain other concealed parts being indicated by dotted lines.

Figures 3 is a sectional view taken substantially along the line 3 3 of Figure 2.

Figure 4 is a fragmentary detail partially in elevation and partially in section, showing certain constructional elements.

Having reference now to the drawings, there is generally indicated at I a lathe bed clamp to which is secured, as by means of Hat-headed screws II, a female index plate I2. A taper pin I3 is provided t0 insure rigidity of the assembly. The index plate I2 is provided with a plurality, illustratively four, of grooves I4 adapted to be engaged by lugs l5 carried by a male index plate I 6. A stud I'I extends through suitable apertures :in-:both ,theindex plates :I6 and I2, beingisecured, as .by a threaded -extremity I3, -in a 1 suitable threaded-aperturein Iclamplli. The male index eiplate Itis secured `to amainibodyportion, :as

by flat-head screws 2|' and setscrewscZZ.

Asbest shown in Figure 2, the body'ziis com- ;prisedrofa relatively:cylindricalf'portion T2 I, from zwhich'extend radiallprojecting members 22, in the .illustrative embodiment shown therebeing vfourof such projections, positioned at right fangles :with .respect to each other, and each .of which is :provided iwith a .channel or groove 23, within 'which is ypositioned'.aknurlednut 24 provided with micrornetric markings 2-5.adapted to register with I. suitableindicating pointsl onthe body aportion, the

nuts being :positioned .for fthreaded :engagement with the threaded stems 26 of stop members 21. In Figurel2, certain of the nuts are omitted for clarity of illustration.

V.Asbest shown infFigure 3, each of thenuts -24 is provided with :achannel 28 within `whichis .positioneda,compression'spring v29 biasing the :nutfinwardlywith respect tothegroove 23 towards the body portion 20, the spring 29 being designed to take up `any end play, such as might be occasioned by wear or the like, to obviate inaccuracy in the adjustment of the stops.

As best shown in Figure 3, each of the threaded shanks 26 is provided with a flat side 30 adapted to be engaged by the extremity of a set screw 3| having a knurled head 32 extending exteriorly of the device, a screw being positioned in each protuberance 22 for engagement with each shank 26.

The body 2t has a suitable recess in the forward side thereof adapted to provide a seat for a pressure plate 33 provided with a, flange 34 adapted to be engaged by one end of a compression spring 35 surrounding the stud Il. A threaded extension 36 of the stud Il has mounted thereon a cap nut 31 provided with an interior recess 3B within which the other end of the spring 35 is seated. Thus, it will be seen that the pressure of the spring 35 normally biases the body 20 and its associated male index plate I6 inwardly with respect to the female index plate I2 and the clamp I0.

A handle member 40 knurled, as at 4I provided with a depending skirt 42, surrounds the spring and cap nut assembly previously described and is secured to the body portion 23, as by means of screws 43 passed through suitable apertures in lugs 44 turned at right angles to the skirt.

From the foregoing, the operation of the device should be readily understandable. When it is associated male index plate may be rotated freely about the stud I1 until the desired stop is in position. Release of the handle will permit the grooves and lugs of the femal and male index plates, respectively, to engage, thus accurately centering the selected stop with respect to the mechanism to be actuated thereby. Obviously, when the particular machine operation requiring the particular stop has been completed, the handle may again be pulled outwardly against the pressure of the spring 35, which normally serves to hold the parts in related assembly, and an additional stop juxtaposed in the stop mechanism of the lathe.

From the foregoing it will now be seen that there is herein provided a device accomplishing all of the objects of the invention, and others, including many advantages of great practical utility and commercial importance.

As many embodiments may be made of this inventive concept, and as many modications may be made in the embodiment hereinbefore shown and described, it is to be understood that all matter herein is to be interpreted merely as illustrative and not in a limiting sense.

I claim:

1. A lathe turret stop carried by a lathe frame, comprising a base, a turret having a plurality of individually adjustable lathe stops rotatably supported by an axle extending through said turret and secured to said base, a pair of detachable index plates secured respectively to said base and to one side of said turret for rotationally positioning said turret upon said base in selective position, spring means surrounding said axle bearing against the other side of said turret, and a retaining and adjusting cap abutting said spring and having screw threaded engagement with said axle, and a combined housing and handle secured to said other side of said turret and enclosing said spring and adjusting cap, and a knurled knob on said housing for disengaging and relatively rotating said index members.

2. A lathe turret stop carried by a lathe frame, comprising a base, a turret having a plurality of individually adjustable lathe stops rotatably supported by an axle extending through said turret and secured to said base, a pair of detachable index plates secured respectively to said base and to one side of said turret for rotationally positioning said turret upon said base in selective position, spring means surrounding said axle bearing against the other side of said turret, and a retaining and adjusting cap abutting said spring and having screw threaded engagement with said axle, said spring engaging a pressure plate, said plate seating in a recess in said other side of said turret and having an axial cylindrical flange extending within said spring and slidably embracing said axle for alining and centering said spring.

HOBART E. RATHER, SR.

REFERENCES CITED The following references are of record in the le of this patent:

UNITED STATES PATENTS Number Name Date 1,480,522 Ferguson Jan. 8, 1924 1,551,039 Magem Aug. 25, 1925 1,690,568 Bullard, Jr. Nov. 6, 1928 2,202,117 Muller May 28, 1940 2,365,196 Honegger Dec. 19, 1944 2,368,408 Brooking Jan. 30, 1945 

